I am seeing a lot of new apartments advertised with pozos ... which I assume are wells? How does that work? I live in an old building and we have a tinanco, a water tank on the roof for each apartment, but obviously the new apartment buildings do not have those. And we have a cisterna, a cistern, which holds the water from the street which comes in twice a day, I think, but I could be wrong, I have heard of buildings which ran out of water, Another where old bills were not paid and deliveries were stopped or most of the deliveries were stopped.. Anyone know more on this?